A new series returns as we follow the brave A&E night-shift teams in Belfast, Newham and Norwich. At Norfolk and Norwich Hospital, a stabbing sends both victim and attacker to A&E.
In Belfast's Royal Victoria A&E, a drunken patient sparks chaos in the waiting room.
A&E staff struggle to deal with an abusive man who claims he's swallowed a pack of heroin.
Doctors assess an 84-year-old woman left confused and vomiting after hitting her head.
Doctors have minutes to save a man's sight in East London after a violent attack.
An 81-year-old woman arrives with a horrific open fracture that shocks even the nurses.
A woman is rushed to A&E after being found in the street having a serious drug reaction.
In Belfast, teenager Jack suffers spinal shock after a catastrophic motorcycle collision.
Police are called to Belfast's Royal Victoria when a female patient becomes aggressive.
Doctors treat a non-verbal young man in a life-threatening neurological emergency.
A semi-pro boxer is rushed in after blacking out from heavy blows to the head.